Double saw for cutting button-blanks.



Patented May 22 i900.

' 'No. 650,l89.

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DOUBLE vSAW FOR CUTTING BUTTON BLANKS.

(Applic'sfiion flhd. Tuna 29, 1895. Renewed Ian. 15, 1900.)

M mm (In lodo'l.)

INVENTOR Nu. s5o,|s9. l P atantedlay 22, 1900.

F. c. osaonn. DOUBLE SAW "FOB CUTTING BUTTON BLANKS. (Application 1 filed Jupe 29, 1895. Renewed Jln. 15, 1900.)

6 Sheets-Sheet 2.

(No Model.)

WITNESSES [N VENTOR v ,e/

No. 650,!89. Patented may 22, I900.

r. c. ossonu.

DDUBLE SAW FUR CUTTING BUTTON BLANKS.

(Application flied June 29, 1895. :Benewed Inn. 15, 1900.) (No Model.) 6 Shaets-Sheet 3.

i Jim 670567":

, rm. 650,!89. Paianted May 22, I900.

F. c. ossonn.

DOUBLE SAWj'FOR CUTTING BUTTON BLANKS.

(Application filed June 29, 1895. Benewed Im. 15, 1900.) (N0 Model.) 6 Sheets-Sheet 4.

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No. 650,139. Patented lay-22, 1900.

' I F. C. OSBOBN.

DOUBLE SAW FOR CUTTING BUTTON BLANKS.

' (Application filed June 29, 1895. Behewed Jan. 15, 1900.) (No Model.) 6 Sheets-Sheet 5.

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FRANCIS o. escorts, or DETROIT, MICHIGAN.

DOUBLE SAW FOR CUTTING BUTTON-BLANK'S.

SPECIFICATION forming part of Letters Patent No. 650,189, dated May 22, 1900.

7 Application iiled June 29, 189 5. Renewed January 15, 1900i Serial No. 1,479. (No model.)

To all whom it may concern.-

Be it known that I, FRANCIS O. OSBORN, a citizen of the United States, residing at De troit, county of Wayne, State of Michigan, have invented a certain new and useful Improvement in Double Saws for Cutting Button-Blanks and I declare the following to be a full, clear, and exact description of the in= vention, such as will enable others skilled in the art to which it pertains to make and use the same, reference being had to the accompanying drawings, which form a part of this specification. V

My invention relates to improvements in machines for cutting button-blanks from the shell. Its object is threefoldfirst, toincrease the capacity of a single machine; second, to overcome the tendency ofthe shell to rotate under the action of the saw or saws, and, third, to provide for starting the saw into the shell. I

The cutters now in common use use but one saw, and in using it the operator holds the shell against the tailpiece while the saw or cutter is forced against and through the shell. Owing to the irregular forms of the shells and other causes, it has been found impossible to hold the shell While being acted upon by the saw except by the hand of the operator, and no one but a strongman can hold it. In addition to the expense of the labor due to the strength required to hold the shell there is great waste of material, owing to the fact that the single saw in passing through the shell under the great pressure necessary to make it out breaks away the back after it has out nearly through.

I overcome the di'fficulties above mentioned by using two saws, which cut the shell from opposite sides and rotate in opposite directions. I

The use of the two saws accomplishes several much-desired results. The machine will out nearly if not quite twice as fast as a single saw, and by rotating the saws in opposite directions the action 'of one saw tending to rotate the shell is balanced by the action of the other and the employment of expensive labor to operate the machine thereby avoided.

In connection with the use of two saws r0- tatin g in opposite directions I employ holding devices, which work within the saws for grip' ping the blanks. The use of these holding devices overcomes any tendency to rotate due to the difierence in the force that may be exerted by one'saw over the other, and they also serve to hold the shell so that the saws will .start their cut. I also employ suitable mechanism for finishing the out after the saws have approached one another as close as possible while rotating in opposite directions without destroying one another. This mechanism for finishing the out consists of means for holding the shell in a fixed position until the saws have approached one another to the limit and then moving the shell or saws to one or both sides to finish the cut.

' One form of machine in which my invention may be embodied is shown in the accompanying drawings, in which-- Figure 1 is a rear elevation of the machine. Fig. 2 is an end elevation from the right of the machine as viewed in Fig. 1. Fig. 3 is a plan view of the clutch and reversing mechanism shown at the left of Fig. 1. Fig. 4 is a similar view showing parts in section. Fig. 5 is a sectional view showing details of the screw-feed for the saws. Fig. 6 is a plan View of the mechanism shown at the right of Fig.

1. I Fig. 7 is a section showing the screw-feed by which the gripping devices are operated.

Fig. Sis a section showing one saw, the clutch, the holding device, and other details. Fig. 9 is a horizontal sectional view on line 00 w of Fig. 2, showing a plan of some of the parts. In the drawings, A represents the frame of the machine. B B are stationary headpieees, in the upper portion of which are the journal-boxes B B. These boxes are shown in section in Fig. 8. In these hearings are mounted the spindles b and I). These spindles are provided at the inner end with the chucks b b and at the center with the sprocket-wheels 12 which run between the bearings.

D D are saws held in the spindles by the chucks d d are horizontal rods extending through the spindles, which are bored to provide a bearing for the rods. These rods are turned down at the inner end to allow that portion to pass freely through the saws.

is the main driving-shaft, mounted in suitable bearings at the rear of the machine and is driven by the pulley c.

C is a counter-shaft driven shaft by the gears c 0 i The spindle b is driven from the shaft 0 by the sprocket-chain c, and the spindle b is driven in an opposite direction from the counter-shaft C by the sprocket-chain 0 The spindles b and b have an endwise movement which carries the saws to and from one another. Thespindles aremoved by arightand-left'screw device near the bottom of the frame, the deta'ilsof whichareshown in F-igrfifi E and E are sleeves having a sliding move ment'in and out in-the bearings e e and also" having a bearing on one'another. Theouter end'of eachof these sleeves is provided with an arm e.,w-hich extends upward'and engages, 2o bya bifurcated connection, with a collar e on trunnions 6 as shown in Figs. 1 and 2. The collar e runs in an annular groove in the spindle. 1 .-F -is a' shaft provided with a right-and-left screw-thread, the two screws operating inthe opposite sleeves. Therotation of this shaft causes the sleeves to move in and out, which movement is transmitted to the spindles b b *through thestandards e and the saws thereby caused to approach or recede from. one another. The screw-shaft F before mentioned is located below and to the rear of the sawspindle, and the standards 6 are inclined forward to bring them'to the spindles; but di- 3 rectly underneath the spindles is a second shaft F, driven from the shaft F by means of the gears f f.

. E are sleeves which carry the standards dtdi, bywhich the rods d d are moved to and from each other inside of the saws and independent of them. The sleeves E E are moved to-and from one another by the screw F actingwith a spring-pressure, so that theaction ,o fthe rodsd d on material between them is a; spring-pressure.

F are blocks having-a sliding connection withthe sleeves within the limits allowed by the pin-and-slot connectionFt F are springs strong enough to hold the 50 sleeves andsliding blocks fixed relatively to one another, except when the 'rods d d are against the blanks, when the blocks will move u p -insideof' the sleevewithout moving the ,rodsdd, butwith a continually-increasing 5 5 pressure on .therods. By these meansthe gripping device is adapted to act onany-thickness-ef shell andtfo stopwhen the rodsreach the shell,w-hile the saws are permitted to-move' -.forward over the rods and enter the shell. 6o Thescrew-shafts F F, by1which the saws and gripping devices are caused to move,"aref operated at will by; the mechanism shown in Figs;- Sand 4:. The shafts are rotated simul- '-,-taneous1y throughthe gears ff. As this di-. rect" gearing'willcause the-shafts torotatezin opposite directions, the right-hand thread on from the main on theotherJ-n The shaft 0 extends through the machine and carries the gear-wheel c and the small sprocket-wheel c. The screw-shaft F carries the-loose gear f the loose sprocketwheel f and the friction-disks f 1. These disks f f have a spline-and-groove connection with the shaft and, while permitted to move along the shaft, cause it to rotate with them. These friction-disks face like disks on the gear f and the sprocket-wheel f respectively.

. f is a disk mounted on the shaft F and is kept from rotating therewith by the arm f, Y which extends to theshaft- O',Lwhich passes through it and is kept from movingendwise on the shaft by a connection consisting of an annular groove on the disk and a pin set in the shaft, which last-named partsmay be assembled by drilling a holevthrough the disk through which the pin is set. Thediskf is provided with a thread which meshes with a like thread on the inside of the ring f r This.

Through the operation of the mechanism just described the screw-shaftscan be rotated in either direction at the will of thezoperator' by transmitting the motion of the drivingshaft 0 through the'gears c and f or through the sprocket-gears and chain. When the power is transmitted 'to the screw shafts through the gearing, the'speed given to the screw-shafts is greater than-when itis:translmitted through the sprocket-chain, the object being to provide means for feeding the saws slowly to the work and then withdrawing them rapidly when the machine is reversed-i The operator sits in front of the machine He 1 jdisk f against the sprocket-wheeh'when the iwith the handle f at his right hand. places the shell between the saws and then moves the handle sons to throwthe frictionsaws .and feeding devicesmove' up against the shell, the holding devices first coming in 1 gcontaet with the-shell; The holding-rods d fdareheld against the shell with the force of ft-he springs F As the feeding mechanism continues to advance the saws and rods-the grip of the holding-rods increases as the saws enter the shell. As the shell is h'eld 'firmly between theserods and the 'sawst'advan'ceflirectly over them, the sawslcann'ot slipovery the-surface of t'he'shell, but must enter it. As the-s aws advance they'cut the-blank from the shell," with the exception of a thin web; This web I cut bymoving the shell to one'or bothsides against the saws; I'will now describe, the mechanism by which that move i 7 one should be opposite the left-hand thread 'ment is accomplished.

G, Figs. 1 and 6, is a short vertical shaft which carries at the upper end the wormwheel 9, which gear meshes in the worm c on the shaft 0.

His a lever having an eccentric connection with the shaft G at g, by which that end of the lever is given a slight vibratory movement.

h is aspring bolted to thelever H, as shown in elevation in Fig. 2, and is provided with a slot it near its free end, through which passes the lower end of the hanger h The spring is held in engagement with the hanger by a pin through the lower end of the hanger below the spring. The hanger h is pivoted at the upper end to an arm h, that extends out from the sleeve 77. This sleeve 7L5 is provided with an interior thread that fits a thread on the end of the screw F. As the screw rotates the sleeve h runs onto it until the end of the screw-shaft comes against the setscrew 71., when for a portion of a revolution the sleeve is caused to rotate with the screwshaft, thereby lifting the lever H until the teeth on the outer end of it come into engagement with the teeth on the plate K K is a fixed plate into which the plate K is dovetailed. K is a plate supported on the rods k 70. This plate under the action of the springs it forces the slide I to the inner extremity of its movement. Until such time as the lever H is raised by the operation of the sleeve 7&5 its end vibrates under the plate K Its adjustment is such, however, that when it is raised and carried by the eccentric g to the limit of its backward movementthe teeth on the lever will register with and slip up between the teeth on the plate K If the sleeve It moves before the lever is in position to register the teeth, it will move against the action of the spring 72, until such time as the lever gets into the proper position, when the spring will draw it up. The lever after it has engaged with the plate K has a rotating and vibrating movement, the plate K receding against the action of the springs 70' k to allow an endwise movement, but preventing any side movement. As soon as the lever H engages with the plate K the lever is held fixed at this end, while it is caused to vibrate at the opposite end by the eccentric connection, giving the center of the lever a vibratory movement. This vibratory movement is transmitted to the sleeve 7L5 through the connectingarm and link, which allow no side swing or movement. This vibration of the lever H shakes the sleeve 72 the screw-shaft F, the rods 01 d, and the shell held between them. This shaking movement throws the uncut portion of the shell alternately against the opposite saws and finishes the cut. To hold the sleeve it As soon as the sleeve 72. runs against the set-screw and lifts the lever H to the limit of its upward movement both the screw-shafts are stopped and with them thefeeding mechanism. For this purpose the friction driving devices are provided.

What I claim is 1. Ina sawing-machine, the combination of two tubular saws oppositely arranged, means for rotating and feeding the saws, and holdin g-rods extending through the saws for gripping and holding the blank, substantially as described.

2. In a sawing-machine, the combination of two tubular saws and means for rotating the saws in opposite directions, whereby the force of the saws tending to rotate the shell is neutralized one by the other, substantially as described.

3. In a sawing-machine, the combination of two tubular saws means for rotating the saws in opposite directions and holding-rods extending through the saws to grip and hold the blanks whereby any unequal action of the saws tending to rotate the shell, is neutralized and the saws caused to enter the shell without slipping, substantially as described.

4. In a sawing-machine, the combination of two tubular saws means for rotating the saws in opposite directions, means for feeding the saws toward one another, and means for moving the shell or material to finish the cut, substantially as described.

5. In a sawing-machine, the combination of two tubular saws arranged to out toward each other, means for feeding the'saws and means for moving the shell or material to finish the out, substantially as described.

6. In a sawingmachine, the combination of two tubular saws cutting in opposition to each other, means for holding the shell or material between the saws, and means for feeding the saws and holding devices simultaneously, sub-. stantially as described.

7. In a sawing-machine, the combination of two tubular saws right and left screw-threaded rods for feeding the two saws simultaneously, holding-rods moving within the saws, a right and left screw-threaded rod for feeding the holding-rods simultaneously, gearing connecting the screw-threaded rods and a clutch mechanism, substantially as and for the purpose described.

S. In a sawing-machine, the combination of two screw-threaded rods for feeding the saws and holding devices respectively, and means for rotating said rods slowlyin one direction and faster in the opposite direction, substantially as described.

9. In a sawing-machine, the combination of two tubular saws means for rotating and feeding the saws, a stop for limiting the feeding 10. Inasawing-maclhine, the combination of two tubular saws and a feeding-rod provided'with-a right-and-left screw for feeding both saws at the same time, substantially as described.

11. In abutton-sawing machine, the combination of a saw or saws, a screw-threaded rod 1 for feeding the saw or saws, a main drivingshaft, the gear on the main driving-shaft, and the loose gear f on the feeding-shaft adapted to driving the feeding-shaft in one direction when the gear f*, is clutched to the shaft, the" small sprocket-wheel c the large sprocket-wheel f and the sprocket-chain adapted to driving the feeding-shaft in the opposite direction, and means for locking'the sprocket-Wheel f or the gear-wheel f to the feeding-rod at the will of the operator, substantially as described.

' 12.. In a button-cutting machine the com bination of thehollow, revolving spindles, the cutting-tools, non-rotatable rods extending through them and through the cutting-tools,

said rods provided with grips or jaws at their inner ends, substantially as described.

13; In a button-cutting machine, the combination of the frame, revolving spindles, the

cutting-tools, feeding-spindles mounted in the frame parallel to said revolving spindles and a connecting-arm between said rotatable spindles and feeding-spindles, substantially as described. v

' 14. The combination of the frame, the revolving spindles, the cutting-tools, the feeding-spindles, the arms connecting the rotatable spindles and feeding-spindles and means for moving the feeding-spindles to and from one another, substantially as described.

'15. The combination of the frame, the re- 16. The combination of the frame, the hollowLrevolving spindles, the cutting-tools opferated by the spindles,-the holding-rods eri tending through the hollow spindles, the feeding-spindles arms connecting the feedingspindles with the holding-rods, and means for operating said feeding-spindles with a spring-pressure, substantially as described.

17. The combination of the frame, the revolving spindles, the cutting-tools, the holding-rods, feeding-spindles, means connecting the feeding-spindles and the revolving spindles, and means for operating the feedingspindles wit-h greater speed on the return than on the forward movement, substantially as described.

18. The combination of the frame, the hollow revolving spindles the cutting-tools operated by the hollow spindles, the holding-rods extending through the hollow spindles, the feeding-spindles, means connecting the feeding-spindles and the holding-rods and means for operating the feeding-spindles, substantially as described. 1

19. The combination of the frame, the revolving spindles, the cutting-tools, the holding-rods, the several feeding-spindles means connecting one set of the feeding-spindles holding-rods, and means for operating the feeding-spindles, substantially as described.

20; The combination of the frame, the revolving spindle, the cutting-tools, the holding-rods, and automatic means for feeding the revolving spindles and holding-rods, substantially as described.

21. The combination of the frame, the revolving spindles, the cutting-tools, the hold the revolving spindles and holding-rods, sub-' stantially as described.

In testimony whereof I sign this specifica- O. H. FIsK, G. M. DAVIS. 

